My point is that recognition of marriage is no business of the State at all. You are conflating government with civilization and society. That's what liberals do. Government is not civilization, and it's not society. It's government - and in America, at least, it's supposed to be severely limited. Starting with religion.
Libertarians and socialists are both enemies of civilization.
They are both my enemies.
“...conflating government with civilization and society”
False distinction.
That government is one of the offices used is beside the point that Civilization has always ‘enforced’ marriage.
So what makes you feel that is no longer neccessary?
Show me a civilization anywhere at any time in history that did not have some form of government? So, yeah. Government is, in fact, a necessary component of civilization.